We went to this museum just a couple weeks ago. They still had Porsches and several very unusual BMWs. We spent as a little over an hour as that was all the time available. A very helpful (and trained!) volunteer (Burl I think) toured us through - how nice to have a tour from someone who can speak knowledgeably to the cars in the museum and the history of design and designers. Admission is only a few bucks.